【摘要】：本試驗(yàn)旨在應(yīng)用康奈爾凈碳水化合物-蛋白質(zhì)體系(CNCPS)和NRC模型評(píng)價(jià)4種糧食加工副產(chǎn)物的營(yíng)養(yǎng)價(jià)值。從東北地區(qū)4個(gè)不同牧場(chǎng)采集了玉米纖維飼料、大豆皮、甜菜粕和豆渣4種糧食加工副產(chǎn)物,測(cè)定其營(yíng)養(yǎng)成分,應(yīng)用CNCPS模型對(duì)蛋白質(zhì)和碳水化合物組分進(jìn)行剖分,并預(yù)測(cè)其潛在營(yíng)養(yǎng)價(jià)值供給量,應(yīng)用NRC模型估測(cè)可消化養(yǎng)分和能值。結(jié)果表明:1)中性洗滌纖維(NDF)的含量由高到低依次為大豆皮、甜菜粕、玉米纖維飼料和豆渣;非蛋白氮(NPN)的含量由高到低依次為玉米纖維飼料、豆渣、甜菜粕和大豆皮;甜菜粕的酸性洗滌不溶粗蛋白質(zhì)(ADICP)含量最高,其余依次為大豆皮、豆渣和玉米纖維飼料,其中玉米纖維飼料和豆渣的ADICP含量差異不顯著(P0.05)。2)非蛋白氮(PA,即NPN)含量由高到低依次為玉米纖維飼料、豆渣、甜菜粕和大豆皮;真蛋白質(zhì)(PB)含量由高到低依次為大豆皮、甜菜粕、豆渣和玉米纖維飼料;不可降解氮(PC)的含量由高到低依次為豆渣、甜菜粕、大豆皮和玉米纖維飼料。3)可代謝蛋白質(zhì)(MP)含量由高到低依次為豆渣、大豆皮、甜菜粕和玉米纖維飼料。4)玉米纖維飼料和豆渣的維持水平總可消化養(yǎng)分(TDNm)含量較高,二者差異不顯著(P0.05);生產(chǎn)水平泌乳凈能(NELP)值由高到低依次為豆渣、玉米纖維飼料、大豆皮和甜菜粕,其中玉米纖維飼料的NELP值與豆渣、大豆皮差異均不顯著(P0.05);生產(chǎn)水平代謝能(MEP)值由高到低依次為豆渣、玉米纖維飼料、甜菜粕和大豆皮。由此可見(jiàn),玉米纖維飼料和大豆皮可以作為奶牛的纖維源飼料;豆渣的過(guò)瘤胃蛋白質(zhì)(RUP)、MP含量最高,可以作為奶牛的蛋白質(zhì)源飼料。4種糧食加工副產(chǎn)物的能值由高到低依次為豆渣、玉米纖維飼料、大豆皮、甜菜粕。
[Abstract]:The purpose of this study was to evaluate the nutritional value of four grain processing by-products by using Cornell net carbohydrate-protein system (CNCPS) and NRC models. Corn fiber feed, soybean husk, sweet rapeseed meal and soybean dregs were collected from four different pastures in Northeast China, and their nutritional components were determined. The protein and carbohydrate components were divided by CNCPS model. The potential nutrient supply was predicted and the digestible nutrients and energy values were estimated by NRC model. The results showed that the content of (NDF) of neutral detergent fiber was soybean peel, sweet rapeseed meal, corn fiber feed and soybean dregs, the content of non-protein nitrogen (NPN) was corn fiber feed, soybean dregs, sweet rapeseed meal and soybean husk. The content of acid washed insoluble crude protein (ADICP) in sweet rapeseed meal was the highest, and the others were soybean husk, soybean dregs and corn fiber feed. There was no significant difference in ADICP content between corn fiber feed and soybean dregs (P0.05). The content of non-protein nitrogen (NPN) was in order of corn fiber feed, soybean dregs, sweet rapeseed meal and soybean husk, and the true protein (PB) content was soybean husk and sweet rapeseed meal. The contents of (PC) in soybean dregs, sweet rapeseed meal, soybean husk and corn fiber feed were soybean dregs, sweet rapeseed meal, soybean husk and corn fiber feed, respectively. The (MP) contents of metabolizable protein were soybean dregs and soybean husks, respectively. The content of total digestible nutrients (TDNm) of corn fiber feed and soybean dregs was higher than that of soybean dregs (P0.05), and the NELP value of production level was soybean dregs and corn fiber feed from high to low (P0.05), and the content of total digestible nutrients (TDNm) was higher than that of soybean dregs (P < 0.05). The NELP value of corn fiber feed was not significantly different from that of soybean dregs and soybean husk (P0.05), and the (MEP) value of production level was soybean dregs, corn fiber feed, sweet rapeseed meal and soybean husk. It can be seen that corn fiber feed and soybean husk can be used as fiber source for dairy cows, and the rumen protein (RUP) MP content of soybean dregs is the highest. The energy values of 4 kinds of grain processing by-products which can be used as protein source of dairy cattle are soybean dregs, corn fiber feed, soybean husk and sweet rapeseed meal in order of energy from high to low.
【作者單位】： 東北農(nóng)業(yè)大學(xué)動(dòng)物科學(xué)技術(shù)學(xué)院;
【基金】：基金項(xiàng)目:國(guó)家奶牛產(chǎn)業(yè)技術(shù)體系(CARS-37)
【分類號(hào)】：S816.15

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